When do you need to upgrade to a better FPR? My stock one is working fine and I don't have any crazy mods, so do I need an upgraded one or not? My upgrades are on my signature.

 

I would get a FPR now. I didn't see your FP though...

 

You got some pretty advanced mods that can suck some gas pretty quickly. Biggest advantage of a better fuel pressure regulator over stock is the speed that it responds and how fast it can add volume to feed your car.

You will know best by checking out your A/F Ratio on a dyno and from regular driving. Usually it shows up at shift points, turbo change over (sequential), and slamming the gas from a roll. All those can cause a dip in fuel pressure if your stock one cannot adjust quickly enough which in turn causes the mixture to be lean the next time an injector fires.

For that reason you see people with aftermarket Pressure Regulators and larger fuel rails, that moment that can cause detonation, you need a little extra.

Overall if you haven't seen a problem yet, you probably won't see one later. You do get some additional tunning capability with a better one but it can be a pain in the *** with all the NTP fittings and braided fuel lines are not cheap to get custom cut.

Hope that helps in some way.